<?php
declare(strict_types=1);

namespace Phred\Tests\Feature;

use PHPUnit\Framework\TestCase;

class StubCompilationTest extends TestCase
{
    public function testStubsCompile(): void
    {
        $stubRoot = dirname(__DIR__, 2) . '/src/stubs';
        $stubs = $this->findStubs($stubRoot);

        foreach ($stubs as $stubPath) {
            $content = file_get_contents($stubPath);
            $compiled = $this->interpolateStub($content);

            $tmpFile = tempnam(sys_get_temp_dir(), 'stub_test_');
            file_put_contents($tmpFile, $compiled);

            $output = [];
            $returnVar = 0;
            exec("php -l " . escapeshellarg($tmpFile) . " 2>&1", $output, $returnVar);

            $this->assertSame(0, $returnVar, "Syntax error in stub: $stubPath\n" . implode("\n", $output));

            unlink($tmpFile);
        }
    }

    private function findStubs(string $dir): array
    {
        $files = [];
        $items = scandir($dir);
        foreach ($items as $item) {
            if ($item === '.' || $item === '..') continue;
            $path = $dir . '/' . $item;
            if (is_dir($path)) {
                $files = array_merge($files, $this->findStubs($path));
            } elseif (str_ends_with($item, '.stub')) {
                $files[] = $path;
            }
        }
        return $files;
    }

    private function interpolateStub(string $content): string
    {
        $replacements = [
            '{{namespace}}' => 'App\\Test',
            '{{viewNamespace}}' => 'App\\Views\\TestView',
            '{{class}}' => 'TestClass',
            '{{name}}' => 'TestName',
            '{{moduleName}}' => 'TestModule',
            '{{template}}' => 'test_template',
            '{{params}}' => '$request',
            '{{body}}' => 'return $request;',
            '{{useView}}' => 'use App\\Views\\TestView;',
            '$dollar' => '$', // For some stubs that use $dollar
        ];

        return strtr($content, $replacements);
    }
}